Virginia Rep. Barbara Comstock is one of the most vulnerable incumbents up for re-election next year. (Bill Clark/CQ Roll Call)

Tuesday’s victories in Virginia and New Jersey had Democratic strategists practically tripping over themselves to predict 2018 good fortunes.

Democrats won the governor’s mansion in both states by wide margins. They picked up at least 16 state legislative seats in Virginia. That included a transgender Democrat defeating a longtime conservative Republican state legislator who authored a so-called bathroom bill. And in Maine, voters supported a ballot measure to expand Medicaid.

The Democratic Congressional Campaign Committee on Monday added 20 seats to its target list for 2018. The House Democrats’ campaign arm is now going after 79 Republican-held seats in the midterms.

President Donald Trump won these newly targeted seats by anywhere from 6 to 49 points. The first round of 59 targets, announced in January, included the 23 GOP-held seats that Hillary Clinton carried last fall. But it also included plenty of red districts, including at least eight districts that Trump carried by 15 points or more.